I'm having trouble filing T4 slips for 2024. I get error message that my repID number doesn't match what is in the XML file. No idea how my redID number would be in a file that comes from QB. Also have had error message that says the transmitter CRA account number in the XML file doesn't match what I used to sign in.

Any ideas?  I've tried more than one of my clients, so it isn't an issue with a particular data file.